mult_by: Multiply selected vectors by a constant
In arestrom/remisc: Some simple utility functions for personal use

Description Usage Arguments Value Examples

Multiply a single vector or selected vectors in a dataframe by a fixed constant value. Vectors must be either numeric or integer.

1	mult_by(dat, mult_value)

`dat`	a dataframe with only integer or numeric vectors
`mult_value`	A numeric or integer value to use as a multiplier

A vector, or dataframe dat with specified columns multiplied by mult_value.

# Create example dataframe
fish_lengths = tibble::tibble(species = c("coho", "coho", "chin", "pink"),
                              fork_length = c(650, 580, 804, NA),
                              total_length = c(660, 589, 815, 450))

# Multiply last two columns by 0.1
fish_lengths[,2:3] = mult_by(fish_lengths[,2:3], 0.1)